Mandrel extractor



Mar. 6, 1923. 1,447,766

R. M. DE VIGNIER.

M-ANDREL EXTRACTOR. msn FEB. 15. :922.

Patented Mar. 6, i923.

Nianrensrarss `earsarvor ffl-tid .t

IVI. DE VIG-NIR, OF BELLEFONTE, DELAVTAEE, ASSIG:OR,.BY 1VIESNE ASSIGBL MENTS, TO NATIONAL VULCANZED .FIBRE CO., l/VILMHGTON, DELAWARE, A

CORPORATION or DELAWARE;

MANDREL vEXTRACT()R.

Application filed- February`15, 1922. Serial No. 536,679.

To @ZZ w hoi/)tit may concern.' i Y `lie it known that l, ROBERT M. `ne VIGJ; Nnnaa citizen of the United States,v and a resident of Bellefonte, county of New Castle, State of Delawaraghave invented a certain new and useful Improvement in li/landrel Extractors," of `which the following' is a specification.

Some Of the objects "of the present invention are to provide an improved mechanism forextracting mandrels from `formed fibre tubes or `tubes of other material; toprovide means .for removing` `mandrels from tubes without damaging-the finished tubes; to provide means for'automatically attach# ing` a removing device to a mandrel, withdrawing suchV mandrel froma tube, and au tomatically releasing the `ext 1acted mandrel; to vprovide continuouslyV acting` `means for successively extracting mandrels from finished fibre tubes; to p'rovice means for varying' the stroke and operation of a'mandrel extracting machine 'for mandrels of differentlength; and toprovide other improve ments as will'hereinafter appear.

VIn the accompanying;dra-wings, Fig. l. represents aA side elevation of a'mandrel eX- tracting machine embodying One form off the present invention; Fig. 2 represents an end elevationof the same; Fig. 3 represents a plan of a head bloc-lz showing oneY form of jaw actuating` mechanism; Fig. 'et repref sents a side elevation of the parts shown in Fig.` 3; Figzb represents a section on `line 5-5 of Fig, 4; and Fig. G'frvepresents a section on lineG-G Of Fig. 5. p

'Referring tothe drawings, one Aform of the present invention consists da frame l() preferably arranged to support means for` alternately extracting mandrels from oppositeends of the machinegandto accomplish suchy result endfstandards'll are provided, each,pair of l,such :standards ,supporting a head4 l2having'a through. opening 13 therein, the diameter of Ywhich is arranged to freely lpass the largest `sizle mandrel which it is 'cetemreted ,will be 'employed' .In the present-1machine a mandrelle .can ryinga .formed ltube l5 of "fibre" or other ateri al is inserted thrugh the opening. 13 witli'tlie end of. the .tnlofei` abuttinga fixed n .t that. by rallies" the .mend-tel "1s axially 'through the 'opening "lfivvh-le the lnview of the fact that the mandrelv engaging; devices for the two `ends .of the machine are of duplicate construction, and operate in like manner, the present description may be simplified by reference to the parts of one Ofthese devices andV by applying corresponding `reference inimerals to like parts in the other.

For the purpose of gripping the fianged end of the mandrel let to cause its withdrawal from the tube 15, a head block Q0 is provided carrying` a pair of oppositely arranged jaws 2l which are pivoted respectively upon trunnion pins 22 laterally projecting to either Yside of two leader nuts 23. One of the nuts 28 hasscrew threaded engagement with a. left hand thread 2li-upon a feed scr-ew 25, while the other nut 23 has screw threaded engagement with a right hand thread E2G also upon the screw 25. rllhe ends ofthe screuT 25 are arranged to be accessible from the outside of the block 20 so that Vthe screw 25 may be turned 'by any suitable Vmeans to vary the distance between the nuts 23 and tlnisadjustthe jaws 21 for varying` sizes of mandrels. Each of the jaws 2l is providedzwitli a lip 27 which is arranged to seat back of `the flanged portion of the mandrel end in closed'position the jaws to draw the mandre-laxially as desired.

l ln order to automatically open and close the jaws 2l, the head block 20 is provided with a recess 30 arranged to receive and `guide slide member el which' in the present construction carries one end' a 'T- head'Qf, the'ends Offwhich seat respectively in `slots 33 of the respective Ajaws 2l, though with sufficient-clearance to permit free relative movement of the parts.' At the opposite `end of the member 31 -is4 -a similar" head '34. the outer `endsurface of which is engaged by coiled* springs 35 which cam 42.

eccentrics 36 located at opposite sides of the body of the member 31. The eccentries 36 are respectively rigid with two vertically journalled pins 37 which project exterior of the block 20 to receive respectively two levers 38, which lie inthe same plane. These' levers 38 are rigid with the respective pins 37 and in closed position of the jaws 21 their outer ends abut to limitY their movement in one direction, while in the opposite direction their movement is limited bythe engagement of the eccentrics 36 with the walls of the recess 30. v

For actuating' the levers 38 the outer or free end of each carries a projectinglug shown here in the form of a roller 40, the arrangement being such that in closed :position of the aws 21 the rollers 40 are relatively close together to be engaged by an opening cam 41 and separated, whilein open positionof the jaws 21 the rollers 40 are spaced apart to be engaged by a closing The opening cam 41 is arranged to bel secured to a fixed part of the machine in the path of movement of the rollers and in a predetermined position for correct timing of the opening of the jaws 21, and is provided with a tapered cam nose 43. As the head block 20 moves in one direction, as will be explained, the rollers 40 meet the cam nose 43 and are swung on diverging arcs to a position which determines the open position 0f the jaws 21. The closing cam 42 is located at the opposite side of the block 20 in the path of the rollers 40 and is `secured to a fixed part of the machine in a predetermined position for correct timing of the closing of the jaws 21. The cam' 42 comprises two forwardly projecting fingers 44 having inclined faces 45 respectively which converge toward a transversely disposed plane cam face 46, the construction being such that when the block 20 moves past the cam 42 the cam faces 45 respectively engage the rollers 40 and initially swing them toward each other whereupon the cam face 46 engages both rollers 40 and moves them to a position determining the closed position ofthe jaws 21.

Asv a means for movably mounting and reciprocating the block 20, it'is provided with supporting wheels 47 arranged in pairs at opposite sides of the block 20, the pairs of wheels respectively travelling upon suitable rail members 48 rigidly carried by the standards 11. Centrally disposed with re spect to the-frame 10 there is a prime mover in the form of a cylinder 50 having a piston 51 therein lfrom which axially disposed piston rods 52 and 53 extend in opposite direc-` tions through the ends of the cylinder to connect respectively to the head lblocks 20. The pri-me mover 50 is of any well known lthe recipi'ocable` valve rod 54 thereof being shown extending longitudinally of the frame 10 in opposite directions from the cylinder 50 but parallel tothe path of movement of' the blocks 2O as controlled by the piston rods 52and 53'.A

.For actuating the valve rod 54 two tappets or trip fingers 55 are iixed to the rod 54 by set screws 560i' other rigidfastening means which will permit adjustment of the tappets 55 fi'om one longitudinal positionto Ianother to vary the timing of the valve action, so that the piston stroke may be changedaccording to requirement-s, suoli for example as different length'mandrels. Normally each tappetk 55 .is located on the valve rod onthe opposite side of its head block 20from the cylinder 50, and inthe path of movement Yof a! lug 57 upon that block 20. The contact relation between the respective tappets 55 and the lugs 57 is such that the valve rod 54 is shifted to reverse the prime mover substantially at the time the jaws 21' have operativelyintel-locked with themandrel to be removed. Thus the valve rod 54 is alternatelyv shifted asfrst lone head block 2() and then the other assumes its mandrel withdrawing position. i

In order toreceive and deliver the mandrels from the machine when theyhave been withdrawn from the tubes and releasedby the jaws 21, each end of' the present machine is provided with a platform 60 fixed to the frame 10 in an inclined position to cause the released mandrels to roll laterally by gravity and be delivered at the side of the machine where they can be removed for use again.

In the operation of the `machine motive fluid is suppliedV to the cylinder 50 and the head blocks20 aremutually `reciprocated in a continuous manner so that when one block 20 is withdrawing a mandrel from a tube, the operator is placing -another mandrel supported tubein vposition at the other end of the machine. This is accomplished by inserting the projecting `fianged end of the mandrel through the die 16, withl the ,tube end abutting the face of the die 16, and will be here assumedas taking place at the right hand end of the machine as shown in Fig.A 1,

other end of the machine. Y

When the .approaching` head block 2O reaches the predetermined positionrelative to the mandrel end, the closing cam 42 is `while ainandrel is being extracted at the niet by the rollers 40, which then ride toward v block 2O at tlieiright is closed theother head; I lblock 2O reaches the position .where its openeccentrics 5G` and thus shift the member `31, against the action` of the springs 35, .tof

simultaneously rotate the jaws 21 toward;

each other so that the lips 27 thereof are rigidly clamped backof the flange on the mandrelend. As this takes placethe lugV 57 on the head 20 'meets the tappet 55 and moj tionis then transmittedito the valve lrod 54:, 1

which moves to` the right as: shown in Figa 1 to reverse the slide valve ofthe prime mover. Substantially atthesame time that thehead i ing `cam 4-1 rides between therollers 40 yto cause the levers 3S t0 .move tli'e-eccentrics 36 so that the member 34. slides under theiaction ofthe springs 35 in a Vdirectionto cause the jaws 2ll to open. This releases theV extracted mandrel which drops to the inclined table 60 and is delivered to the side ofthe A mach-ine. The `prime movem` nouT functions to draw the held mandrel from itsrtube while anothertube and mandrelareplaced.in posi-` tion at-the left end of the machine torepeat: the foregoing operation. y In this way alternate extracting operations are carried out'so that there may be substantially continuous extractingoperaticns whereby mandrels may be quickly removed from finished tubes-and returned without delay for use again in'tube forming operations.

Y means for causing said device to be clamped vto `said mandrel, power `actuated means for' moving saidy clamping device, ina direction i to extract said mandrel from said tube,'and

means for preventingjsaid tube movingin, the same direction during said extracting operation;

2. In a mandrel extracting machine, the

combination of a clamping device arranged to engage a mandrel having a tube thereon, means for causing said device to be clamped to said mandrel, power actuated means for moving said clamping devicein a direction to extract said mandrel from said tube, means for preventing said tube moving in the same direction during said extracting operation, and means for automatically re-4 leasing said mandrel` at a predetermined time.

3. In a mandrelextracting machine, the

combina-tion of a clamping device arranged to engagea mand-rel havingy a tube thereon, meansffor causingvsaid device to be clamped toj said mandrel, power actuated means for moving said .clamping device in a Vdirection to extract said. mandrel from said tube, means for preventing said tube moving in the. same direction duringsaid extracting operation, means for automatically releas- ,inO said mandrel` at apredetermined time,

and a delivery device 1 for the extracted mandrel. j l

4; Ina mandrelextracting machine, the combination ofa movably #mounteda head block, a clamping device carried thereby andv arranged to engage, a mandrel having a tube i thereon, power means for reciprocating; said head block, means' operating at a predetermined .timeon the `non-workingstrolna of said power means for causing said clamping device `to close to. grip said mandrel, ymeans operating at a predetermined time on the working stroke Vof said power means for causing said clamping deviceto open to release saidmandrel, and meansfor preventing said tube moving with said mandrel.

5. In a mandrel extracting machine, the

combination of a movably fmounted head j block, aclampingdevice carried-thereby and arranged' to engage a mandrel having a tube thereon, `power means'- for reciprocating said head block, means operating at a predetermined time on the non-working stroke of `said powermeans for causing said clamping device vto close to grip said mandrel, means operating at a predetermined time on the `working 'stroke of said power means for causing said clamping device to open to Vrelease,A said mandrel, means for preventing said tubemoving .with said mandrel, and means controlled by said block yfor reversing said power means.`

6. Ina mandrel extracting machine. the combination of a movably mounted head block,` clampingjaiws pivoted to said `block iid and arranged to engagea mandrel having a i tube'thereon, meansljfory actuating said jaws f to openfor closeto engage or release said mandrel, Ipower means forreciprocating said head block, means located adjacent the path of movement lof said bloclfor causing said actuating meansto function at predetermined times, and means for preventing said tube moving with said mandrel.

' 7. In a 'mandrel extracting machine, the combination of a movably mounted head block, clamping jaws pivoted to said block and arranged to engage a mandrel having a tube thereon, means including members projecting from said block for actuating said jaws to open or close to engage 0r release Vsaid mandrel, power means for reciprocating said head block, means located in thc path of movement of said members for causing said actuating means to function at pre- .ggf v j 1,447,766

determined times, and means for preventing` said tube moving with said mandrel.4

8. In a mandrel extracting.machinefthe combination of a iiiovably mounted head block, clamping jaws pivoted to said block and varranged to engage' a mandrel having a tube thereon, means including a slide memberfor actuating said jaws" to open orV close to enga-ge or release said mandrel, power means for reciprocating said head block," means located adjacent the path of movement of said block for causing said actuating `means to function at predetermined times, and means for preventing said tube moving with said mandrel.

9. VIn .a -n'iandrel extracting machine, the combination of a inovably mounted head block, clamping jaws pivoted to said block and arranged to engage a mandrel having a tube thereon, means including'V a spring pressed slide member for actuating saidjaws l to 'open or close to engage or release said mandrel, `power means for reciprocating said head block, `means located adjacent the path of movement of said block for causing said .actuating means to function at prede teiminedtimes, and means for preventing said tube moving with said mandrel.

l0; In a mandrel extracting "machine, the combination of a movably mounted head block, clamping jaws pivoted to said block and arranged to engage a iiiandrelhaving a tube thereon, means including a 'spring pressed slide member and an eccentric mechf anism for actuating said jaws to open or yclose to engage or release said mandrel,l

power means for `reciprocating said head block, means located adjacent the path of movement of said block for causing said actuating means to function at predeter- 'mined` times, and means .for preventingsaid tube moving with said mandrel.

, L. 11. In a ma lrel extracting machine, the

combination o* a movablymounted head block, clamping jaws pivoted to said block and arranged to engage a mandrel having a tube thereon, `'means including trip rollers projecting from said block for actuating said jaws to open or close to engage or release said mandrel, power means for reciprocatin said head bloclr,means located in the pati of movement of said trip rollers said tubes moving in thesafme direction as the respective mandrels.

13. In a mandrel extracting machine, the combination' of twoV oppositely arranged fixed yheads having openings respectively for the passage of mandrels, apair of head blocks mounted to. reciprocate between said heads, clamping jaws carried by each block and arranged to engage oppositely located mandrels, means for actuating the respec tive jaws to open or close to engage or release a mandrel, power means for recipro cating said block, means located adjacent the path of movement of said heads for causing said actuating` means to function at predetermined times, and means for preventing a tube carried by any mandrel from moving with `said mandrel.

lll. In a mandrel extracting machine, the combination of tvvo oppositely arranged fixed heads having openingsrespectively for the passage of mandrels, av pairjof head blocks `mounted to reciprocate between said heads, clamping jaws carried by each bloc-'lr and' arranged to engage oppositely located mandrels, means for actuating the respective jaws to open or close to Vengage or release a mandrel, power means for reciprocating said block, means -located adjacent the path of movement'of saidheads. for causing saidv actuating means tof function to open one set of jaws and close the other set of jaws, and means for preventing a tube carried by any mandrel from inovingwith saidmandrel.

lSigned at 4W'ilmington, in the county of New Castle, and VState of Delaware, this' 10th day-of February, 1922.

` ROBERT M. DE VIGNIIER. 

